Nice job - I like the sliding weight - looks good. Wish I'd had more copper around when I made mine but it's not a material I really work with - had just a few offcuts of sheet under the metal shear so that had to do. Glad to see someone else with a lathe - began to think I was the only member with...

Here is one I made last winter with a sliding weight - http://i479.photobucket.com/albums/rr159/morepowr/weldingground.jpg The tip and ground faces on the round tubing are copper building wire that were tig welded directly to the steel , then turned down in the lathe . No more arc marks on work , bi...

Biggest problem I've ever had was grounding that lead to odd porosity and sparks . Make up one of Jody's hold-down fingers , just built mine and love it as it gives a nice grounding point directly close to the work .
Sarge